/Engine/Source/Runtime/RHICore/Public/RHICoreTransientResourceAllocator.h
void Flush ( uint64 CurrentAllocatorCycle, [FRHITransientMemoryStats](API\Runtime\RHICore\FRHITransientMemoryStats) & OutMemoryStats, [FRHITransientAllocationStats](API\Runtime\RHI\FRHITransientAllocationStats) * OutAllocationStats )